<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<title></title>
</head>
<body>
	<script type="text/javascript">
		/*
			switch(表达式){
				case value1: //表达式和value1做全等比较
					content1://表达式===value1,执行代码
					break; //跳出分支语句

				case value2:
					content2;
					break;
				...

				default:
					content;//没有表达式相等就会执行该代码
			}
		*/
		let res = Number(prompt("请输入温度"))
		switch(res){
			case 0:
					console.log("厚外套")
					break;
			case 10:
					console.log("短袖")
					break;
			case 20:
					console.log("背心")
					break;
			default:
				console.log("裸奔")
		}

		//输入月份 返回这个月有几天
		let month = Number(prompt("请输入月份"))
		switch(mon){
			case 1:
			case 3:
			case 5:
			case 7:
			case 8:
			case 10:
			case 12:
				console.log("31天")
				break;
			case 4:
			case 6:
			case 9:
			case 11:
				console.log("30天")
			case 2: console.log("28天"); break;
			default: console.log("好好输")
		}
	</script>
</body>
</html>